Metrohm Vision – Tutorial - Manual (Page 22)

1.5 Library Validation – Testing the Library Model 
NIRS Vision Tutorial – Operation 
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Figure 3: Results Qualification Method
1 Sample Spectra 2 Histogram
Distance versus Frequency
Color Code:
 Dark blue = Training Set;
samples determined to be suitable for library development.
 Light blue = Acceptance Set;
samples suitable for library development but which are redundant
compared with those in the Training set. The Acceptance set is used for
Validation of the Library.
 Red = Rejected;
samples determined to be unsuitable for library development because they
differ significantly from those in the Training and Acceptance sets.